Since to the world, the dance “Gangnam Style” has gained greart great popularity.
A. introduced
B. introducing
C. being introduced
D. to be introduced
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(答案→)A. introduced
B. introducing
C. being introduced
D. to be introduced
解析:introduce的逻辑主语the dance “Gangnam Style”与introduce之间是被动关系,故用过去分词作时间状语。